Musnad Ahmad 790:124

'Abd al-Razzaq narrated to us, Sufyan narrated to us, from Khalid al-Hadhdha', from al-Hasan, from 'Imran ibn Husayn, who said: "A man emancipated six slaves of his at the time of his death. The Prophet, peace and blessings of Allah be upon him, drew lots among them and emancipated two of them."